Parser: Make skipping HTML comments optional.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 11dd1487207ba89a889a9398ac80908d5182467d..994a93b55dd687ab8019ee5dc2ef60498cef9267 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -6561,8 +6561,9 @@ class Script: public Struct {
   static const int kCompilationTypeBit = 0;
   static const int kCompilationStateBit = 1;
   static const int kHideSourceBit = 2;
-  static const int kOriginOptionsShift = 3;
-  static const int kOriginOptionsSize = 3;
+  static const int kAllowHtmlCommentsBit = 3;
+  static const int kOriginOptionsShift = 4;
+  static const int kOriginOptionsSize = 4;
   static const int kOriginOptionsMask = ((1 << kOriginOptionsSize) - 1)
                                         << kOriginOptionsShift;